Firearm



. 1,53 ?,36@ G. N [CH 61.50 N

FIREARM Filed April 30, 1924 2 Sheets-Sheet 1 gz/siav wvlalsom May 12, 1925. 1,537 369 G. NICHOLSQN FIREARM Filed April 50, 1924 2 sheets-sheet z flirt/10111111111117).all/I174 Patented May 32, 1925.

GUSTAV NICHOLSON, CF ZTAGUBURI DEL' ROSARIO, PARAGUAY.

FIREARM.

Application filed April 30, 1924. Serial No. 710,058.

To all echo m it may concern:

Be it known that I, Gns'rav NICHOLSON, a citizen of Paraguay, residing at Itacuburi del Rosario, Republic or" Paraguay, have invented certain new and useful improvements in Firearms; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to new and useful in'iprovements in fire-arms, and particularly to revolvers.

The principal object of the invention is to provide a firing mechanism for a revolver wherein the ordinary pivoted, and. hooksha-ped hammer is done away with, and the danger of such hammer catching in the clothing of the user, obviated.

Another object is to provide a mechanism whereby the hammer is automatically cocked and released by the single rearward pivotal movement of the trigger.

A further object is to provide a mechanism of this character wherein the hammer travels in a straight line, and is adapted to be cocked by hand.

Other objects and advantages will be apparent from the following description when taken in connection with the accompanying drawing.

In the drawing: 7

Figure 1 is a vertical longitudinal sec tional view through a fire-arm made in accordance with the invention, and showing the mechanism in normal position.

Figure 2 is a similar sectional view showing the mechanism in the position assumed when the hammer is cooked and on the point of being released.

Figure 3 is a similar sectional view show ing the position of the parts when the hammer has been cooked by hand.

Figure 4 is a vertical sectional'view on the line 4l4 of Figure 3.

Referring particularly to the accompanying drawing, 10 represents the frame or" the grip of the stock of the revolver, which has the removable side plates 11, retained in position by the screw 12. The upper portion of the stock is formed with the longitudinal grooves 13, in which is slidably disposed the hollow hammer 14, the rear end of the said hammer being slid-able through an opening 15, in the rear end of the upper portion of the stock, where it is provided with a milled knob 16.- Rigidly' mounted transversely in the stock, between the grooves 13, and disposed through the longitudinal slots 17 of the hammer,is a web or bar 18, a coil spring being disposed within the hammer and bean ing against the forward end wall and against the said bar, as shown at 19. On the forward end wall of the hammer there is formed the integral firing pin 20, which passes through an opening 21, in the breech 22, to strike the cap of the cartridge 23. Between the rear end wall of the hammer, and the rear side of the bar 18, is a shorter coil spring 2 1, which serves to take up the recoil of the hammer.

The fire-arm is also provided with the re- 7 volving cartridge cylinder 25, and belowthe cylinder is the trigger guard 26. Pivotally supported within the guard 26 is the trigger 27, the same having a rearward extension 28, projecting through an opening in the grip frame, and provided with a lateral pin 29, engaged in the slot 30' in the adjacent end of the arm 30. This arm 30 is pivotally mounted in the frame, at the rear side thereof. ()n the extension 28 of the trigger there is pivotally mounted an upwardly extend ing pawl 31, which engages with the ratchet 32 oi the cylinder, for the purpose of rotating the same. Pivotally connected to the forward end portion ofthe arm 30, and extending vertically therefrom, is a link 33. To the upper end ofthe link 3-3 there is pivoted the safety actuating arm 34:, and pivoted to the inner endot the arm 34, inwardly of the link 33, is the cooking arm 35. The arm 35 has a projection 36, on'its free end which engages in a notch 37, formedin the lower side of the hammer. The arm 8 llias an angularly extending-end portion 38 which is swiveled in the safety sliding block 40,

and is pivotally mounted within the stock. Connected to and extending between the arm 30, and the arm 35, is a coil spring 41, which exerts pressure to-torce the arms 30and 35 apart. -On the arm 35, adjacent theend of the spring 41; is a roller 35' which is adapt ed to bear against the lower side of the ham-. mer, as the hammer moves forwardly and rearwardly; v

When the trigger is pulled rearwardly,

the pin 29 slides in the slot 30, and while at the same time the arm 30 is raised to turn the cylinder at single notch,- andthe'rejby present a new car'tridge in the breech The arm '30 is elevated by the pin 29, and as the hammer, but out or" contact therewith, ex-

cept for the roller while the arm slides the block downwardly from in front of the hammerf The full rearward movement of the trigger causes the arm 35 toass'nme a position wherein the projection:

, 36 will belwithdrawn from the notch 37 of theham'mer, so that the hammer will be released and projected: forwardly, by the spring 19, to strike ts pin 20 against the cartridge. The recoil of the hammer is 7 taken up by the shorter spring 24, Thus,

the Cooking and discharging of the fire ar'n'i is arcomplished by the's'inglc movement of the trigger." v r V I Pivotally mounted on the forward side of the frame 10 is an upwardly extending lever 42, the 'upper end of which is slightly curved, asat 43, and provided with a terminal shoulder 4A, for the receptionjo'i one end Wall of the slot 44 formed through the "lever 30, and through which the arm 42 is arranged to move as the lever 30 rises and falls. .The pivotal portion of the lever 42 is formed with a downward projection 45, and between this projection and the adjacent portion of the frame 10, is a coil spring 46, which.

servesto normally urge the upper end of the leventoward the said pivotal connection. By this construction the hammer may be pulled, or cooked, by hand, the operator grasping the knob 16, and pulling the hammer rearwardlyt-hrough the opening 15.

I The movement of the hammer, above-men tioned, causes the wall of the notch 37 to engage with the projection 36, and draw the members 33, 34, and 35, upwardly, the spring .tlflSSlStlIIg in-s'uch movement of the arm When the lever 30 has moved upwardly to the ro 'er distance the i'vota-l connection a P v before-mentioned, between the arms at and 35, will permit the arm 4:2 to be rocked rearward'ly by its spring 46, so that the upper end thereof will be disposed beneath the lever 30 with the Wall of the slot 44 resting on the shonider 44. The hammer V will thus be held cocked, and to fire the revolver, it is only necessary to pull "the trigger rearward-1y the remaining short distame-to move the arm 35 upwardly and vrelease the projection 36 from the notch :37,

when the, ,lrantnner will ifiy forwardly. ';Re-- lease oft-he trigger permits the arm42 to be rocked back to iiorrnalposition by its a of the trigger, the leg 49, onjt'he forward pivoted end of the arm 34, will engage the -mer=and the breech wall.

hammer, to move the hammer Tearwardly a suflicient "distance to permit the blbck to slide into safety position between the ham- Pivotally mounted beneath the cylinder 25 fiisa spring pressed block 50-having a notch 51 receiving the lug'52 or" the trigger, and

the "hag 53 for engagement in the notches of the cylinder, shown at v This constitutes the cylinderflock. v 7

hat is claimed is:

1 r 1. A revolver mechanism including a 's'lid- 7o tively engagedfwith the hammer for cocking and releasing thehammer, an arm operativelyconnected with the slidable block for movingthe block out of the path of the hammer, and operative connections between the first-named arm and the second named arms for actuating the latter upon movement of the trigger.- V p i r 'A. revolver mechanism including a slid able spring pressed hammer, trigger, a pivoted arm movable by the trigger, an arm pivotally connected with the mova'l'ile arm,

a second arm pivotally connected with s'a'id.

' movable arm, hammer engaging and releasmg means on the first oi. the arn'is, and a safety means operable by the second pivotal arm. v V c 3. A revolver n'ieclranisin including a slidable spring pressed hammer, a sli-dable block in advance of the hammer, a pivoted trigger, a pivoted arm operatively engaged by the trigger and l'raving an openi' g, a vertical link movablv. carried by the pivoted arm, an arm 'pivotally'c'arried by'the upper end of the link, a second arm pivotally carried by the first arm, ;a guide or the" hammer, a projection on the second-named arm, the 7 hammer having a notch receiving the said projection, and a means movable by thelink carried arm and engageable with the fi-rstnamed pivoted arm,

4. A revolver mechanism including a *sli-dable spring pressed hammer, a slida'ble block in advance of the hammer and having an opening therein, a pivoted trigger, a pivoted ar-m having; one end engagedwith the trigger for movement thereby, a link carried by the pivoted arm, and a toggle connected with the link and having engagement with the hammer, and having a projection engaged in the opening of saidslidable block. 7 In testimony whereof, I aflix my signature,

, in the presence of two witnesses. spring a6. Asthe parts move toward normal position, after the firing, and release 7 I I eos'niv'moiroLsot-n Wit-nessesp Y Forms-TEN, P M; on LA CUEVA Mania- 

